Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Patent
1984-01-09
1985-08-13
McCamish, Marion E.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
428133, 428137, 604383, 604385R, 128156, B32B 310, A61L 1500
Patent
active
045350205
ABSTRACT:
A perforated thermoplastic film with less than ideally shaped tapered capillaries which has an increased liquid flow rate through the tapered capillaries and a method for making such a film. The method includes forming a perforated thermoplastic film having tapered capillaries from a resin into which an effective amount of a polarizable, migrating surfactant has been blended therewith and then treating the perforated thermoplastic film with a corona discharge treatment sufficient to increase the flow rate of liquid through said perforated film and provide a film having a percent run off of from about zero to ten percent.
The perforated film made in accordance with the invention has a much higher liquid transmission rate than similarly made non-surfactant treated perforated film having tapered capillaries which has been treated only with a corona discharge treatment. The latter may be conducted as the film is being formed and perforated.
REFERENCES:
patent: 2847086 (1958-08-01), Muller
patent: 3384696 (1968-05-01), Makansi
patent: 3471597 (1969-10-01), Schirmer
patent: 3703569 (1972-11-01), Wolkowicz
patent: 3719736 (1973-03-01), Woodruff
patent: 3814101 (1974-06-01), Kozak
patent: 3880966 (1975-04-01), Zimmerman et al.
patent: 3881489 (1975-05-01), Hartwell
patent: 3929135 (1975-12-01), Thompson
patent: 4170304 (1979-10-01), Hake
patent: 4323069 (1982-04-01), Ahr et al.
patent: 4327730 (1982-05-01), Sorenson
patent: 4341217 (1982-07-01), Ferguson et al.
patent: 4353799 (1982-10-01), Leonard
Raley Garland E.
Thomas Paul E.
Atkinson William M.
Ethyl Corporation
Johnson Donald L.
Leondard Paul H.
McCamish Marion E.
LandOfFree
Perforated film does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Perforated film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Perforated film will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2318026